32 HISTORY OF PERSIA The Expansion of Mam to the Hrcst^ A.IK 25- 3 i (646- 6 p).__The limits of Moslem expansion had not yet been reached, and under Abu Sarh, a foster-brother of Othman, the Arabs pushed west of Barca and even threatened Carthage, whose Governor was defeated in a hard-fought battle. This period, too, saw the launching of the first Moslem fleet, in A.H. 28 (649). Its initial enterprise resulted in the capture of Cyprus, and three years later it won a naval victory off Alexandria, under the command of Abu Sarh. The Campaigns in Persia^ A.H. 31 (65^2).— The death of Omar had been the signal in Persia for a widespread but badly organized insurrection, and the Moslem leaders , sought not only to reconquer what had been lost but to ' extend the sway of Islam eastwards. Ibn Aamir, the Governor of Basra, who was entrusted with the conduct | of the campaign, first reduced the province of I Airs, and then marched across the Lut and invaded the province of Kuhistan, of which he obtained possession. After these successes he sent a summons to submit to the Governor of Herat, who craftily replied that he would do so when Nishapur was taken. Ibn Aamir proceeded to invest Nishapur, while at the same time devastating the neigh- bouring valley [of Tus. His troops suffered severely from the cold but he reduced the city by blockade, and its Governor paid a sum of 700,000 dinars, together with many articles of value. Thereupon the Governors of - Herat and of Merv both made terms. It was in this same year that,' as already mentioned, Yezdigird was murdered, and his death must have been a great relief to the Caliph. Ibn Aamir, pressing constantly eastwards, won a great victory on the Oxus, which led to the submission of Balkh and other outlying provinces of the Persian Empire. His generals crossed the Hindu Kush> subdued Kabul, and conquered the Sistan and Kerman provinces. The advance, however, was, not unchequered by reverse, for the Arabs were defeated by the Khazars in Azerbaijan, and an entire army perished in the snows of Kerman.1 1 I would locate the scene of this dimter m Sardti, as the Arab* occupied Jlrttft, Fide Yule's Marco Polo (Cordier'g edition), vol. i. p, 313.